Answer:
6 hours and 45 minutes
Explanation:
2.75 hours = 2 hours and 45 minutes
3 hours 20 minutes
0 hours 40 minutes
2 hours 45 minutes
5 hours 105 minutes
6 hours 45 minutes
converting to minutes
3*60+20+40+2.75*60=405 min = 6 hours 45 minutes
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